Automatically-controlled tripping-block.



E. RUSSELL.

AUTOMATICALLY CONTROLLED TRIPPING BLOCK.

APPLICATION FILED MAY 15. 1,918.

i Q Q I Yatmiefi Nov, 12, 1918.

6mm 1 @m;

ERNEST RUSSELL, 0F PHILADELPHTlIA, lENNSYLVANIA.

AUTOMATICALLY-CONTROLLED TRIPPING-ZBLOCK.

Specification of Letters Patent.

Patented Nov. 12, 1918.

Application filed May 15, 1918. Serial No. 234,757.

To all whom it may concern:

Be it known that I, ERNEST RUssELL, a citizen of the United States, serving on de tached duty at Pier 19 North, Philadelphia, Pennsylvania, have invented certain new and useful Improvements in Automatically- Uontrolled Tripping-Blocks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an automatic releasing attachment intended for use with hoisting apparatus when it is desired to release a block, rope, chain, boat-falls, or the like quickly when the load is removed from said hoisting apparatus, as when a life boat is lowered into the water, or a coal bucket is lowered on deck.

My invention is especially intended to be used in connection with apparatus already constructed and in general use, and without the necessity of departing from existing shapes, or such material as can be ordinarily had in the open market.

My invention will be more fully understood after reference to the accompanying drawings, in which:

Figure 1 shows a block fitted with the improved releasing attachment, with the block shown as supporting the load, and the falls being indicated in dotted. lines.

Fig. 2 is a similar view to Fig. 1, except that the load has been detached.

Fig. 3 is a side elevation of the parts shown in Figs. 1 and 2.

Fig. 4 shows a modification in which the releasing attachment is carried by the end of a chain suspended from a block; and

Fig. 5 is a perspective view of the weight ed arm Which is adapted to be attached to the back of the hook for tripping the same when desired.

Referring first to Figs. 1, 2 and 3 A represents a block of any suitable or desired construction, from which is suspended the hook B constructed in the usual way, which hook is adapted to engage in a ring or eye C supporting the weight D.

E represents an arm carrying the counter weight E, at one end, and having the opposite end 6 secured to the back of the hook B in any convenient way, as by means of the bolts or rivets 6 passing through the bolt holes a. This arm E is preferably bent, as at e and 6 so as to have the upper portion 0 fit snugly against the side of the block or other hoisting device, so as to get it as much out of the way as practicable; while the lower end of the arm passes through the eye I) of the hook B.

In the device shown in Fig. 4 the hook B is secured to the end of a length of chain F instead of directly to the block A as in the former figures, and this hook is shown as engaging in the loop C.

It will be seen that when the weight D is supported on the hook B, the hook and its arm E, with its counterweight E, will be held in the position shown in Figs. 1, 3 and l, but when the weight is released from the hook B the counterweight E will throw the hook out of engagement and the hook will become disengaged from the ring C or loop C, or other attaching means, as the case may be.

It will be seen that the herein described device may be used in connection with a rope, or chain, or other device suspended from any hoisting tackle, and that the hook will remain in the holding relation until the load is removed therefrom when the device will automatically release itself from engagement with. the load.

Having thus described my invention what I claim and desire to secure by Letters Patent of the United States is An automatic releasing device of the cl1aracter described, comprising a hook provided with an eye, supporting means engaging said eye, and an arm passing through said eye and having its lower end secured to the back of said hook and its upper end provided with a counterweight, the said arm being so bent as to cause said arm and counterweight to fit snugly against said support ing means when the hook is in the operative position, substantially as and for the purpose described.

In testimony whereof I affix my signature.

ERNEST RUSSELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

